Elevator-gate.



PATENTED MAR. 22, 1904.

H0 MODEL.

UNITED STATES Patented March 22, 1904-.

PATENT OFFICE.

CHARLES C. SCHREIBER, OF CINCINNATI, OHIO, ASSIGNOR TO THE L. SCHREIBER & SONS COMPANY, .OF CINCINNATI, OHIO, A COR- PORATION.

ELEVATOR-GATE.

SPECIFICATION forming part of L etters Patent No. 755,397, dated March 22, 1904. Application filed January 6, 1904. Serial No. 187,863. (No model.) i

To all whom it may concern..-

Be it known that I, CHARLES C. SoHRnrBER, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Elevator-Gates, of which the following is a specification.

My invention relates to a device for closing elevator-doors in which two parallel doors moving in the same direction are employed to close the cab-opening, both doors passing behind the partition, one doorthe frontdoor to travel at twice the speed of the rear door.

The ob ect of my invention is to provide a cheap. durable, and easy mode of accomplishing this result, the features of which are more fully set forth in the description of the accompanying drawings, forming a part of this specification, in which- Figure 1 is a front elevation looking from the inside of the shaft of the top section of the doors and the door-moving devices. Fig.

2 is a side elevation of the pair of door-supporting devices. Fig. 3 is a central vertical section on line :0 as, Fig. 1.

A represents the door-posts of the cabway.

B represents a stationary panel.

C represents the rear door, and D the front door.

C represents the rear door.

G represents a gooseneck-bracket arm rigidly secured to the top frame of the door.

H represents aroller journaled in the gooseneck-bracket. I represents a track on which said roller runs. 7 There are preferably two such roller-supports to a door.

D represents the top framepiece of the front door. K represents a gooseneck-bracket rigidly secured to the same. L represents a roller journaled to said bracket, as shown in Fig. 2. r

M represents a track, tracks M and I being top frame-piece of the parallel and arranged one in front of the R represents an endless sprocketchain engaging and traveling over the sprockets O.

S represents an endless sprocket-chain engaging with the sprockets P.

6 represents stubs rigidly secured to the top of gooseneck G and for projecting upward and engaging the links of the sprocket-chains S.

0 represents a stub rigidly secured to the gooseneck K at the appropriate place to project into and engage the'length of the sprocketchain R.

(1 represents the stud on which the differential pair of sprocket-wheels is journaled.

d represents a washer journaling on said wheels upon their axis.

For convenience of construction the sprocket-wheel P has a hub. The entire length of the axis and the sprocket-Wheel 0 seats upon the front end of the hub and is keyed thereto by the feather it, so that both wheels must move in unison.

, Mode of operation: It will be observed that the sprocket-wheel O is twice the diameter of the sprocket-wheel P. Consequently the chain traveling on the sprocket-wheel O will move at twice the speed of the chain of sprocketwheel P. The operation of the door-closing device is very simple and obvious. vator attendant takes hold of the front door after the fastening-catch has been released and gives it a slight pull which starts the sprocket- Wheel in motion, and they will readily and,

easily run back into position, one door passstationarypanel. A slight pullon the front door when in a closed position will start them in motion, and they will move forward and come in closed position; when they may be secured by a catch or other appropriate means. The above device is exceedingly simple and effective and is inexpensive as well as durable.

I have shown and described a sprocket-Wheel and sprocket-chain which I deem the simplest and best mode but any link belt with appropriate carrier is the equivalent thereof.

Having described my invention, I claim 1. In an elevator-door apair of tracks, two door members slidably mounted on said track shaft, and ea pin for holding said sprocket- The elerespectively, two wheels, an endless carrier connecting them fixed to one of said door members, two Wheels being of different diameter than the first-named wheels, an endless carrier connecting them, fixed tofthe'other door members and journal-supports for said wheels, means connecting the first-named pair of wheels and means connecting the secondnamed pair of wheels, substantially as de-- scribed.

2. In an elevator-door a pairof tracks, two door members sliding thereon respectively, two shafts fixed above'the casing upon opposite sides of the doorway, upon each shaft a pair of wheels which are of different diameter fixed to rotate in unison, the said wheels being situated so that two of them turn in the plane of onedoor movement and two of them turn in the plane of the other door'movement,

and endless carriers connecting the wheelsin the same plane and also connected to said door members respectively, substantially as described.

3. A pair of endless-belt carriers of difierent sizes secured together and mounted upon a common shaft, with a second pair at the to one carrier and the'second door to the other carrier, substantially as des cribed.'

. 5. In combination with two diiferentiallytraveling door members sliding in parallel planes, parallel tracks in the frame, rollers riding on said'ti'acks and supporting said door members respectively, -two pairs of wheels diflering in diameter journaled on each side of the frame, each pair being fixed to rotate in unison, one member of-each pair turning in the planes of'said door members, endless m1,

riers connecting the wheels in the same plane, and connections between the ,doors and the endless carriers, substantially as described.

6. In a doorway, parallel tracks, rollersthereon, two door members supported by said rollers and slidable in parallel planes, a pair of wheels of different diameter fixed to rotate in unison, said wheels being journal'ed on the door-frame With'its members in the respective planes of the parallel tracks, a duplicate pair-of wheels journaled on the other side of the door-frame, an endless carrier connecting the two Wheels of the same plane fixed to one of said door members, and a second endless carrier connecting the two Wheels fixed to the second door member, whereby when said doorsare slid in either direction they travel at.

diflerential speeds, substantially as described.

7. A door-operating device comprising parallel tracks, door members sliding thereon respectively, wheels of different diameter fixed to rotate in unison in the planes of the door members respectively, said wheels being supported on the casing, and transmitting devices between each wheel and its respective door member, whereby one of said doors is caused to be moved faster than the other, substantially as described.

In testimony whereof I have hereunto set my hand.

CHARLES C. SCHREIBER. Witnesses:

.E. 'BAIN,

OLIVER B. KAISER. 

